I just wanted to say thanks to all of you people that have put in such great info in this forum. I found so many useful threads with information I thought I was going to have to go to the dealership for. Well after reading and reading I could not find a related post about this and hopefully someone might be able to shine some light on it. I have a 2002 Nissan Altima 2.5 S, Has 108,000 miles on it and running strong. However when I am accerating I can hear a high pitched humming sound and when I let off the gas the humming becomes more a low pitched sound and slows down as the car does. I can only hear the noise when the windows are up and the radio is low. Anyone have any ideas? If it will be useful I can record the humming and host the wav file on my webserver. ASny help is good help and welcome.

hmm.... My observation is the exact opposite of yours.... After accelerating and taken my foot off the gas pedal (without pressing the brakes) i hear a droning sound like metal against metal until i press the brakes... 02 Alti with 68miles

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